8-Arm PEG-NH2 (MW 5000) (8-Arm PEG-Amine (MW 5000)) HCL is a multi-arm PEG derivative with amine groups at the end of each of its eight arms. The primary amine or NH2 groups are reactive, allowing them to rapidly form stable amide bonds when reacting with activated carboxylic acids (such as NHS esters).
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